Now there are company-run car-sharing services (Zipcar, who’ll give you $75 in driving credit if you sign up now; Car2Go, offering 30 minutes of drive time) and individual car-sharing services employing electronic thumbs: Sidecar matches drivers with passengers, who can tip if they want, as does Lyft (also coming to Seattle). RelayRides lets car owners rent their actual cars. Continue reading Car2Go, Shared Life, and the Productivity of Possessions